Gun-sight.



5 33-233. 192659766 SR I i R.A.FESSENDYEN.

1 GUN SIGHT.

APPLICATION FILED JUNE 23. IBIS.

1 ,265,766 Pate nted May 14, 1918.v

ihll lim REGINALD A. FESSENDEN, 0F BROOKLINE, MASSACHUSETTS.

GUN-SIGHT.

Specification of Letters Patent.

Patented May 14, 1918.

Application filed. June 23, 1915. Serial No. 35,957.

To all whom it may concern Be it known that I, REGINALD A. FESSEN- DEN,a citizen of the United States, residing at Brookline, in the county ofNorfolk and State of Massachusetts, have invented certain new and usefulImprovements in Grun- Sights, of which the following is a specification.

For most ranges, for example from 0 to 1000 yards, I have devised andinvented a sight which does away with the necessity of the adjustment ofthe sight with varying distance; a matter which is often forgottenduring the excitement of action, and which adjustment may be incorrectif the range is given incorrectly. The apparatus invented is both sightand range finder. It consists of a V slot, with sides so curved thatwhen used as a front sight and pointed at an advancing soldier, if therifle is slid up so that the soldiers shoulders (or knapsack) comebetween the sides of the groove and the front end of the rifle iselevated till the shoulders just touch both sides of the groove, therifle will be at the right elevation to hit the soldier. This has theadvantage over the negative angle sight in that it is a natural movementand can be applied to men lying down in the trenches, and does notrequire the enemy to be standing up. The V groove may also be applied totelescopic sights, in which case, instead of using the V on the frontsight it is engrave in the eye-piece tube.

My invention will be understood by the drawing, in which- Figure 1 is afront elevation of a gun barrel with my improved sight attached,

Fig. 2 being a side elevation thereof.

Fig. 3 is a front elevation of a telescopic eye-piece on which my sightis applied.

In Figs. 1 and 2, A is the gun barrel and B is the front sight. Thesight B is of substantially the size of the standard peep sight now usedby the United States Army. To form a sighting space there is cut downfrom its top a V-shaped groove the walls of which are curved and marked7), this groove terminating in two opposed openings or finders b whichas shown are substantially circular, though they may be differentlyshaped, their purpose being mostly to allow the user of the gun to findthe object to be sighted more easily. Between the openings 6 is thedirection point 5 or sight proper.

In practice direction is determined by means of the point Z2 then byraising or lowering the muzzle as occasion may re quire, until the sidelimits, 2'. 6., the shoulders or knapsack of the soldier, appear just totouch the walls of the groove, when the correct range will have beenfound.

In Fig. 3 the outline b, 5 of the sight is engraved or otherwise appliedto the eyepiece of the telescope. As the eye-piece is glass, the findersare unnecessary.

It will be noted that in the sight shown in Fig. 1 the material of whichthe plate is formed is opaque, and consequently the material must be cutaway as shown in Fig. l in order to provide both the sight proper andalso the finders, 2'. 6., the openings 6 on each side of the sight.VVhene however, the sigh tnis a'telescopic ightnsugh as is shown in Fig.3, the cutting away is urn'iecessarymausetheglass itself of which theplate is made is tran sparentnnd hence the portions of the pi'a't'ewhich are on each side of the sight will be usable as a finder.

In using either of these sights, if the rifle is slid up so that theenemys shoulders or knapsack come between the edges of what may betermed the forks of the plate in the one case or the indications of theforks, viz: the lines marked Z) in Fig. 3 in the other case, where theplate is transparent, the rifle will be at the right range to hit theobject.

What I claim is 1. In a device of the kind described a plate having aforked opening, the curvature of the sides of the fork being such thatthe horizontal distance between the sides of the fork is a function ofthe trajectory of the gun to which the device is attached.

2. In a device of the kind described a plate havin a forked opening, thecurvature of the sic es of the fork being such that when the target isjust completely seen between the sides of the fork the gun will have thecorrect elevation for the target.

3. In a device of the kind described, a plate having a forked sightingfield, the edges of said forked sighting field approaching each other attheir base to give an unobstructed vision between them, and havingbetween them at their base a sight member, and finding fields located oneach side of the sight member adapted to offer an unobstructed vision ofthe object to be aimed at.

5 4. A device of the kind described comprising a forked plate, the forksof said plate being in the same plane, the opposing edges of the lowerparts of said forks being 0ppositely recessed to form openings throughwhich the object to be aimed at may be 10 found, said plate having apointed projection located between the bases of said forks to serve as asight.

REGINALD A. FESSENDEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

